html, body, #app {
  width: 100%;
  height: 100%;
  font-family: Helvetica Neue,Helvetica,PingFang SC,Hiragino Sans GB,Microsoft YaHei,SimSun,sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f5f5f5;
  font-size: 14px;
}

* {
  border: none;
  outline: none;
  box-sizing: border-box;
}

ul, li {
  list-style: none;
  margin: 0;
  padding: 0;
}


.el-dropdown-menu {
  max-height: 180px;
  overflow-y: auto;
}

a {
  text-decoration: none;
}
